<template>
  <div class="todo-footer">
    <label>
      <input
        type="checkbox"
        :checked="Allcheck === todoList.length && todoList.length != 0"
        @input="allChange($event.target.checked)"
      />
    </label>
    <span>
      <span>已完成{{ Allcheck }}</span> / 全部{{ todoList.length }}
    </span>
    <button class="btn btn-danger" @click="allClear">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  props: ['todoList', 'allChange', 'allClear'],
  data() {
    return {}
  },
  computed: {
    Allcheck() {
      return this.todoList.reduce((p, c) => {
        return c.done ? p + 1 : p
      }, 0)
    },
  },
}
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
